* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
*/
+
+/*
+ * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
#include "gtkadjustment.h"
+#include "gtkmarshalers.h"
#include "gtksignal.h"
static void gtk_adjustment_init (GtkAdjustment *adjustment);
-static gint adjustment_signals[LAST_SIGNAL] = { 0 };
+static guint adjustment_signals[LAST_SIGNAL] = { 0 };
-guint
-gtk_adjustment_get_type ()
+GtkType
+gtk_adjustment_get_type (void)
{
- static guint adjustment_type = 0;
+ static GtkType adjustment_type = 0;
if (!adjustment_type)
{
- GtkTypeInfo adjustment_info =
+ static const GtkTypeInfo adjustment_info =
{
"GtkAdjustment",
sizeof (GtkAdjustment),
sizeof (GtkAdjustmentClass),
(GtkClassInitFunc) gtk_adjustment_class_init,
(GtkObjectInitFunc) gtk_adjustment_init,
- (GtkArgSetFunc) NULL,
- (GtkArgGetFunc) NULL,
+ /* reserved_1 */ NULL,
+ /* reserved_2 */ NULL,
+ (GtkClassInitFunc) NULL,
};
- adjustment_type = gtk_type_unique (gtk_data_get_type (), &adjustment_info);
+ adjustment_type = gtk_type_unique (GTK_TYPE_OBJECT, &adjustment_info);
}
return adjustment_type;
object_class = (GtkObjectClass*) class;
+ class->changed = NULL;
+ class->value_changed = NULL;
+
adjustment_signals[CHANGED] =
gtk_signal_new ("changed",
GTK_RUN_FIRST | GTK_RUN_NO_RECURSE,
- object_class->type,
+ GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkAdjustmentClass, changed),
- gtk_signal_default_marshaller,
+ _gtk_marshal_VOID__VOID,
GTK_TYPE_NONE, 0);
adjustment_signals[VALUE_CHANGED] =
gtk_signal_new ("value_changed",
GTK_RUN_FIRST | GTK_RUN_NO_RECURSE,
- object_class->type,
+ GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkAdjustmentClass, value_changed),
- gtk_signal_default_marshaller,
+ _gtk_marshal_VOID__VOID,
GTK_TYPE_NONE, 0);
-
- gtk_object_class_add_signals (object_class, adjustment_signals, LAST_SIGNAL);
-
- class->changed = NULL;
- class->value_changed = NULL;
}
static void
}
GtkObject*
-gtk_adjustment_new (gfloat value,
- gfloat lower,
- gfloat upper,
- gfloat step_increment,
- gfloat page_increment,
- gfloat page_size)
+gtk_adjustment_new (gdouble value,
+ gdouble lower,
+ gdouble upper,
+ gdouble step_increment,
+ gdouble page_increment,
+ gdouble page_size)
{
GtkAdjustment *adjustment;
return GTK_OBJECT (adjustment);
}
+
+/**
+ * gtk_adjustment_get_value:
+ * @adjustment: a #GtkAdjustment
+ *
+ * Gets the current value of the adjustment. See
+ * gtk_adjustment_set_value ().
+ *
+ * Return value: The current value of the adjustment.
+ **/
+gdouble
+gtk_adjustment_get_value (GtkAdjustment *adjustment)
+{
+ g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.);
+
+ return adjustment->value;
+}
+
+void
+gtk_adjustment_set_value (GtkAdjustment *adjustment,
+ gdouble value)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ value = CLAMP (value, adjustment->lower, adjustment->upper);
+
+ if (value != adjustment->value)
+ {
+ adjustment->value = value;
+
+ gtk_adjustment_value_changed (adjustment);
+ }
+}
+
+void
+gtk_adjustment_changed (GtkAdjustment *adjustment)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ gtk_signal_emit (GTK_OBJECT (adjustment), adjustment_signals[CHANGED]);
+}
+
+void
+gtk_adjustment_value_changed (GtkAdjustment *adjustment)
+{
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ gtk_signal_emit (GTK_OBJECT (adjustment), adjustment_signals[VALUE_CHANGED]);
+}
+
+void
+gtk_adjustment_clamp_page (GtkAdjustment *adjustment,
+ gdouble lower,
+ gdouble upper)
+{
+ gboolean need_emission;
+
+ g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
+
+ lower = CLAMP (lower, adjustment->lower, adjustment->upper);
+ upper = CLAMP (upper, adjustment->lower, adjustment->upper);
+
+ need_emission = FALSE;
+
+ if (adjustment->value + adjustment->page_size < upper)
+ {
+ adjustment->value = upper - adjustment->page_size;
+ need_emission = TRUE;
+ }
+ if (adjustment->value > lower)
+ {
+ adjustment->value = lower;
+ need_emission = TRUE;
+ }
+
+ if (need_emission)
+ gtk_adjustment_value_changed (adjustment);
+}
projects / ~andy / gtk / blobdiff